Earth is spinning at 1670 km/h at the equator. Use this

number to find Earth’s equatorial diameter.

2 answers

24 hr in a day

one revolution per day

1670 km is 1/24 of the equatorial circumference
The final answer should be around 12,764 if you use 3.14 for pi. Circumference= diameter times pi. Take 1,670 times 24 to get circumference 40,080. Divide 40,080 by pi 3.14 whatever to get 12,764.